Wilwood 170-17090 GT Series Big Brake Flared Bell Disc Brake Rotor Hat

The Wilwood 170-17090 is a GT Series Big Brake Flared Bell Rotor Hat, precision machined from premium aluminum alloy to deliver an optimal balance of high strength and minimized weight. Designed for serious street performance and competition applications, this rotor hat is engineered to perform reliably under the most demanding braking conditions.

Key Features:

• Precision-machined aluminum alloy construction for high strength with reduced unsprung weight
• Flared bell design suited for rotor mount bolt circles of 8.38" and larger
• Threaded rotor mount holes for use with standard through-hole mount rotors
• T-Nut and bobbin compatible — threaded holes also accept T-Nuts or bobbins for use with specially machined slotted-hole dynamic mount rotors
• Offset range: 1.88" to 3.00" for rotor diameters of 12.19" and larger
• Compatible with matched Wilwood rotor hardware kits for a complete, secure installation

Wilwood GT Series Flared Bell hats are the preferred choice when working with large-diameter big brake rotor assemblies. When paired with the correct Wilwood rotor hardware kit, the 170-17090 delivers solid, dependable mounting performance in racing and high-performance street environments.